The books topic is not open yet, as I was going to put a list of my favorites.
I think Whitley Strieber's books are fiction, and he has done more to destroy ufology's standing than many other authors.
Travis Walton's book is interesting, even though he makes a bigger noose for himself (He states the others did not see the object, just the light. He also makes the claim he never made any money off the abduction claim, forgetting about the $5000 National Enquirer payment, two book deals, and a movie deal). The positive part of his case is he saw two types of aliens and they did not look like the Betty and Barney Hill case (one group looked like the Starchild from the UFO Hunters episode on abductions). Also, Mr Walton lost ten pounds and yet was nourished. A mark on the back of the neck could of been made by the alien visitors and that saved his life. I recommend the book so you can make up your own mind, as I am on the fence on the case.
"Captured" by Kathleen Mardsen and Stanton Friedmen about the Hill case is very good. Updated information and the whole case is re-examined.
"Shoot Them Down" by Frank Feschino is about the Summer of 1952 flying saucer wave and includes the Flatwoods Monster case.
"Alien Agenda" by Jim Marrs has some very good cases in it. There is an extensive bibliography for other authors in that book.
Those are some books to get you started. Many are available at your library (some can be ordered), and all are available at amazon.com.
Goddess Bless,
Lloyd